65401031 has 2 divisors, whose sum is σ = 65401032. Its totient is φ = 65401030.

The previous prime is 65401009. The next prime is 65401033. The reversal of 65401031 is 13010456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65401031 - 2¹⁰ = 65400007 is a prime.

It is a super-2 number, since 2×65401031² = 8554589711725922, which contains 22 as substring.

Together with 65401033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 65400994 and 65401012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65401033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32700515 + 32700516.

It is an arithmetic number, because the mean of its divisors is an integer number (32700516).

Almost surely, 2^65401031 is an apocalyptic number.

65401031 is a deficient number, since it is larger than the sum of its proper divisors (1).

65401031 is an equidigital number, since it uses as much as digits as its factorization.

65401031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 65401031 is about 8087.0903914820. The cubic root of 65401031 is about 402.8977711952.

Adding to 65401031 its reverse (13010456), we get a palindrome (78411487).

The spelling of 65401031 in words is "sixty-five million, four hundred one thousand, thirty-one".